Yes, you can go straight to check-in from the reminder email. Tap the confirmation code and you're in. No need to start in Delta.com, FlyDelta app, or TravelNet. That's a real boom to us parents who only have the first two of those unless our "travel planner" is available to check us in. You still have to drop bags if you're checking luggage, so that hasn't changed. But we just did a day trip to Seattle (to watch the Giants lose, boo!) and never stopped for a kiosk or ticket counter. Woohoo!